12+x=-3(4-x) help please

2 answers:

7 0

12 + x = -12 + 3x
12 + x = 3x - 12
12 = 3x - 12 - x
12 = 2x - 12
12 + 12 = 2x
24 = 2x
x = 24/2
x = 12

5 0

12+x=-3(4-x)
12+x=-12 + 3x
3x - x = 12 + 12
2x = 24
x = 12

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